Comparison of amplification of weak ultrashort pulses by parametric and stimulated Raman scattering processes in crystals and gases

摘要

We have carried out, for the first time to our knowledge, careful measurement of amplification of femtosecond supercontinuum pulses by a single-pass collinear and noncollinear optical parametric process in BaB/sub 2/O/sub 4/ (BBO) crystal and stimulated Raman amplification of the same kind of seed pulses in H/sub 2/, D/sub 2/, HD, and CH/sub 4/ gases, in all cases excited with the same 150-fs duration frequency-doubled pulses from a regenerative-amplified Ti:sapphire laser.